Intro:

In the ATP World Tour Finals at London's O2 Arena Stanislas Wawrinka beats Marin Čilić and sets up an all-Swiss semi-final against Roger Federer.

Script:

Stanislas Wawrinka qualified for the semi-finals of the ATP World Tour finals with a 6-3 4-6 6-3 victory over Marin Cilic.

The Swiss third seed needed just three games to set up a last four clash against compatriot and close friend, Roger Federer, in Saturday's semi-finals at London's O2 Arena.

He quickly broke the Croatian's serve to move into a 3-1 lead after just 13 minutes in the opening set of their final round-robin match.

But Wawrinka surrendered the second set to the US Open champion.

However the US Open quarter-finalist broke twice in the decider and wrapped up victory when eighth seed Cilic served a double fault on the second match point.

Wawrinka has won three titles this season. In January, he captured his first Grand Slam title at the Australian Open and a few months later lifted his first ATP World Tour Masters 1000 trophy at the Monte-Carlo Masters when he overcame Federer.